Product Information of Nanfang china flanged butterfly valve metallurgy
valve suppliers produced by Nan Fang is mostly used in the following aspects.Nan Fang has professional engineers and technicians, so we are able to provide one-stop and comprehensive solutions for customers.
Company Advantages 1. The design of Nanfang flanged butterfly valve involves four major parts, namely, micro-filtration membrane, compressed carbon, ultrafiltration membrane, and filter life indicator, which are all indispensable parts in water treatment. 2. This product feels soft and has many other amazing qualities such as hypoallergenic material and moisture wicking & anti-microbial fabric. 3. The product is very versatile due to its strong resistance, which makes it a popular solution in solving the industrial and commercial problems.
Company Features 1. As a competitive electric actuated butterfly valve supplier, Nanfang is very famous in this market. 2. We believe that our success is dependent upon having the best management team. Combining their years of experience, they ensure that we have the right structure and culture in place to service the needs of the projects. 3. With the development of China's market economy, Hangzhou Fuyang Nanfang Valve Industry Co., Ltd. vigorously implemented the strategy of internationalization and diversification. Check now! We always stick to high quality for pneumatic butterfly valve . Check now! Nanfang is devoted to providing customers with high quality motor butterfly valve . Check now! Hangzhou Fuyang Nan Fang Valve Industry Co., Ltd now has won the recognition of more customers due to its high quality service. Check now!
In the past, the main consideration for control valve packing selection is the operating temperature of packing. When the temperature is lower than 200℃, use PTFE packing; When the temperature is higher than 200℃, the packing is graphite. Now, when selecting the packing, not only to consider the working temperature, but also to consider the affection of process control by the friction of packing, such as hysteresis, sealing quality, service life, and so on.The principle of choosing packing is to reduce the friction and prolong the service life as far as possible under the premise of ensuring the required level of leakage.For the friction of a graphite packing, it is much greater than that of a PTFE packing, so PTFE packing should be used as long as the temperature permits.Summarize the main points of packing structure design and application:1. Different packing boxes and packing structures are suitable for different applications. The correction selection of the packing box and packing structure, can reduce the friction and prolong the service life under the required sealing performance.2. In the packing structure, the packing layers and length are not the more than better usually packing length is 1.5 times the stem diameter.3. It is very important to improve the surface finish and surface accuracy of the stem and packing box. For PTFE packing, the finish of stem and the packing box is not enough, and it will reduce the sealing performance and cause increasing leakage;4. The design of the packing structure should be able to automatically adjust the compression force and compensate for the reduction of the compression force caused by wear, etc., so as to facilitate on-site maintenance and installation.5. The improper installation of the control valve will cause uneven friction, for example, when the horizontal installation, the stem dead weight will increase pressure on the lower line of packing, increase friction; And for the upper line of the packing, it has poor sealing performance due to the pressing force reduction.
Installation of NPS6 (DN150) soft seated ball valves with pneumatic actuator at a chemical factory.Soft seated ball valve, taking a rotation movement of 90 degrees, maintain a ball as its plug body with a round hole passing through its axis. The Nanfang soft seated ball valves take a main function of distribution, cutting off and transition of medium’s flowing. With a small rotation of 90 degrees and turning torque, soft seated ball valves share a well-performed sealing effect. Recently, the relevant development of soft seated ball valves has been endowed with the characteristics of flow throttling and controlling.Soft seated ball valves share such characteristics with tight configuration, stable sealing, and convenient repairing. The sealing surface of soft seated ball valves maintains a closing position between ball’s surfaces without any flushes by the mediums, employed in the working mediums of water, solvents, acids, gas and etc, as well as mediums under tough working environment such as oxygen, methane, ethylene and etc. The soft seated ball valves can share an integral structure or a combined type.